I tried uploading to my server to see if the problem was consistent. It was, and I also got a 404, where the app seems to be looking for deploy/apps/common/b4w.simple.min.js.map in my directory. Seems weird.

Do you have any other machines you can test it on? In my experience, Java and Mac don't play nicely. I suspect you still have Java problems. You might make sure all old versions are removed and do a clean install. You might do a clean Blend4Web install as well to rule out that as a problem. See if this video helps with Java.

In the video linked above, towards the end he gives instructions to changing the path variable. This has solve issues for me in the past on Mac.A few hints:To show hidden files and folders on a Mac, paste this into your terminal:

defaults write com.apple.finder AppleShowAllFiles YES

Then hold the Option key, then right click on the Finder icon in the dock and click Relaunch.In your Home directory, find .bash_profile. In the video, he opened it from the terminal but I opened it with Sublime Text to edit it.Paste this into the file to replace what is there: